CN111924331A - A method and system for optimizing the structure of vertical brackets in the process of steel coil transportation and static placement - Google Patents

Abstract

The present invention provides a method and system for optimizing a vertical bracket structure in the process of steel coil transportation and static placement. The method includes: judging whether the side plate load-bearing of the vertical bracket structure meets the requirements; If the load-bearing of the side plates does not meet the requirements, "optimize the vertical bracket structure"; if the requirements are met, no processing is required; judge whether the load-bearing of the middle plate of the vertical bracket structure meets the requirements; if the middle plate of the vertical bracket structure bears the load If the requirements are not met, "optimize the vertical bracket structure"; if the load bearing of the middle plate of the vertical bracket structure meets the requirements, no treatment is required. The invention combines the stress and deformation of the vertical bracket under different load-bearing conditions, so as to realize the optimization of the weak part of the vertical bracket structure in the process of steel coil transportation and static placement.

Description

A method and system for optimizing the structure of vertical brackets in the process of steel coil transportation and static placement

technical field

The invention relates to the technical field of vertical bracket structure optimization, in particular to a vertical bracket structure optimization method and system for steel coil transportation and stationary process.

Background technique

With the increasingly fierce market competition in the steel industry, while the output of steel coils is increasing year by year, it is urgent to improve the quality and efficiency of steel coil transportation, containerization and stacking. The vertical bracket is used for steel coil transportation and stationary process to protect the steel coil quality from damage during logistics and transportation. As a platform device carried by a unit, the solid wood vertical bracket is composed of panels and skids. The number of skids and the area of the panels are determined by the quality and area of the goods. The imperfect structure and size design of the vertical bracket will cause damage such as bending and deformation of the bracket, which will lead to economic losses and safety accidents of the enterprise. Therefore, how to optimize the structure of the vertical bracket during transportation and standing has become an urgent problem in the field. technical issues to be resolved.

SUMMARY OF THE INVENTION

Based on this, the purpose of the present invention is to provide a method and system for optimizing the structure of vertical brackets in the process of steel coil transportation and stationary process, so as to realize the optimization of the vertical bracket structure in the process of steel coil transportation and stationary process.

In order to achieve the above object, the present invention provides a method for optimizing the structure of a vertical bracket in the process of steel coil transportation and standing, the method comprising:

Step S1: judging whether the load-bearing of the side plates of the vertical bracket structure meets the requirements; if the load-bearing of the side plates of the vertical bracket structure does not meet the requirements, step S3 is performed; if the requirements are met, no processing is required;

Step S2: judging whether the load-bearing of the middle plate of the vertical bracket structure meets the requirements; if the load-bearing of the middle plate of the vertical bracket structure does not meet the requirements, perform step S3; if the load-bearing of the middle plate of the vertical bracket structure meets the requirements, no processing is required;

Step S3: Optimizing the vertical bracket structure.

Optionally, the step S1 includes:

其中，y表示钢卷的纵坐标，f₂(x_i)为根据划分区域确定的临界参数值，L_bc表示面板跨度；The side plate of the vertical bracket structure is divided into two stages; the first stage is y∈(0,f ₂ (x _i )], and the second stage is

Among them, y represents the ordinate of the steel coil, f ₂ (x _i ) is the critical parameter value determined according to the divided area, and L _bc represents the panel span;

Determine the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage;

Select the largest of the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage as the first bending stress to be compared;

Determine whether the first bending stress to be compared is greater than or equal to the static bending strength of the panel; if the first bending stress to be compared is greater than or equal to the static bending strength of the panel, perform step S3; if the first bending stress to be compared is less than Panel static bending strength, no operation is required.

Optionally, the step S1 further includes:

Calculate the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage;

Select the largest of the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage as the compressive stress to be compared;

Judging whether the compressive stress to be compared is greater than or equal to the allowable compressive stress, if the compressive stress to be compared is greater than or equal to the allowable compressive stress, perform step S3; if the compressive stress to be compared is less than the allowable compressive stress , no processing is required.

Optionally, the step S2 includes:

According to the principle of symmetry, a quarter of the middle plate is divided into regions in the width direction, and the first region, the second region and the third region are obtained respectively;

Determine the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region;

Select the largest of the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region, and the maximum bending stress corresponding to the third region as the second bending stress to be compared;

Determine whether the second bending stress to be compared is greater than or equal to the static bending strength of the panel; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel, perform step S3; if the second bending stress to be compared is less than The static bending strength of the panel does not need to be processed.

Optionally, the step S3 includes:

Glue and seal the plywood strapping, and change the edge plate notch and the middle plate notch from right angles to rounded corners;

Design the edge guard for the panel extension edge board, encapsulate the part beyond the foot, and assemble the packaged edge guard to the middle board with a nail gun.

The present invention also provides a system for optimizing the structure of a vertical bracket in the process of steel coil transportation and standing, the system comprising:

The first judgment module is used to judge whether the load-bearing of the side plates of the vertical bracket structure meets the requirements; if the load-bearing of the side plates of the vertical bracket structure does not meet the requirements, the "optimization module" is executed; if the requirements are met, no need deal with;

The second judgment module is used to judge whether the load-bearing of the middle plate of the vertical bracket structure meets the requirements; if the load-bearing of the middle plate of the vertical bracket structure does not meet the requirements, execute the "optimization module"; if the load-bearing of the middle plate of the vertical bracket structure meets the requirements request, no processing is required;

The optimization module is used for optimizing the vertical bracket structure.

Optionally, the first judgment module includes:

其中，y表示钢卷的纵坐标，f₂(x_i)为根据划分区域确定的临界参数值，L_bc表示面板跨度；The side plate of the vertical bracket structure is divided into two stages; the first stage is y∈(0,f ₂ (x _i )], and the second stage is

Among them, y represents the ordinate of the steel coil, f ₂ (x _i ) is the critical parameter value determined according to the divided area, and L _bc represents the panel span;

a first maximum bending stress determining unit, used for determining the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage;

a first to-be-compared bending stress determination unit, configured to select the largest of the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage as the first to-be-compared bending stress;

a first judging unit for judging whether the first bending stress to be compared is greater than or equal to the static bending strength of the panel; if the first bending stress to be compared is greater than or equal to the static bending strength of the panel, execute "optimization module"; if If the first bending stress to be compared is less than the static bending strength of the panel, no operation is required.

Optionally, the first judgment module further includes:

The maximum compressive stress determination unit is used to calculate the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage;

a unit for determining the compressive stress to be compared, configured to select the largest of the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage as the compressive stress to be compared;

The second judging unit is used to judge whether the compressive stress to be compared is greater than or equal to the allowable compressive stress, if the compressive stress to be compared is greater than or equal to the allowable compressive stress, execute "optimization module"; When the comparative compressive stress is less than the allowable compressive stress, no treatment is required.

Optionally, the second judgment module includes:

an area dividing unit, which is used to divide a quarter of the middle plate in the width direction according to the principle of symmetry, and obtain the first area, the second area and the third area respectively;

a second maximum bending stress determining unit, configured to determine the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region, and the maximum bending stress corresponding to the third region;

The second to-be-compared bending stress determination unit is configured to select the largest of the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region as the first Second, the bending stress is to be compared;

a third judging unit, configured to judge whether the second bending stress to be compared is greater than or equal to the static bending strength of the panel; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel, execute the "optimization module"; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel If the second bending stress to be compared is smaller than the static bending strength of the panel, no treatment is required.

Optionally, the optimization module includes:

The glue sealing module is used to glue and seal the plywood strapping, and change the edge plate notch and the middle plate notch from right angles to rounded corners;

The encapsulation module is used to design the edge protection for the panel extension edge plate, encapsulate the part beyond the feet, and assemble the packaged edge protection to the middle plate with a nail gun.

According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

The present invention provides a method and system for optimizing a vertical bracket structure in the process of steel coil transportation and static placement. The method includes: judging whether the side plate load-bearing of the vertical bracket structure meets the requirements; If the load-bearing of the side plates does not meet the requirements, "optimize the vertical bracket structure"; if the requirements are met, no processing is required; judge whether the load-bearing of the middle plate of the vertical bracket structure meets the requirements; if the middle plate of the vertical bracket structure bears the load If the requirements are not met, "optimize the vertical bracket structure"; if the load bearing of the middle plate of the vertical bracket structure meets the requirements, no treatment is required. The invention combines the stress and deformation of the vertical bracket under different load-bearing conditions, so as to realize the optimization of the weak part of the vertical bracket structure in the process of steel coil transportation and static placement.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

Fig. 1 is the flow chart of the structure optimization method of the vertical bracket used in the steel coil transportation and the stationary process according to the embodiment of the present invention;

FIG. 2 is a schematic diagram of the stress on the side plate of the vertical bracket according to the embodiment of the present invention;

3 is a schematic diagram of a side plate force model according to an embodiment of the present invention;

FIG. 4 is a simplified schematic diagram of the stress on the side plate according to the embodiment of the present invention;

FIG. 5 is a schematic diagram of the stress on the middle plate of the vertical bracket according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of a plate stress region in an embodiment of the present invention;

FIG. 7 is a schematic diagram of the division of the force-bearing area of a plate in an embodiment of the present invention;

Fig. 8 is the anti-cracking chamfer at the notch of the side plate according to the embodiment of the present invention;

Fig. 9 is the anti-cracking chamfer at the plate notch in the embodiment of the present invention;

10 is a schematic diagram of an edge guard according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of the assembly of the edge guard middle plate according to the embodiment of the present invention;

FIG. 12 is a structural diagram of a vertical bracket structure optimization system used for steel coil transportation and stationary process according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide a method and system for optimizing the structure of vertical brackets in the process of steel coil transportation and stationary process, so as to realize the optimization of the vertical bracket structure in the process of steel coil transportation and stationary process.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Example 1:

As shown in FIG. 1 , the present invention provides a method for optimizing the structure of a vertical bracket in the process of steel coil transportation and standing, the method comprising:

Step S1: Determine whether the load-bearing of the side plates of the vertical bracket structure meets the requirements; if the load-bearing of the side plates of the vertical bracket structure does not meet the requirements, step S3 is performed; if the requirements are satisfied, no processing is required.

Step S2: Determine whether the load bearing of the middle plate of the vertical bracket structure meets the requirements; if the load bearing of the middle plate of the vertical bracket structure does not meet the requirements, perform step S3; if the load bearing of the middle plate of the vertical bracket structure meets the requirements, no processing is required.

Step S3: Optimizing the vertical bracket structure.

Each step is discussed in detail below:

When the coil is not biased, the stress condition of the side plate is shown in Figure 2, and a typical stress model of a simply supported beam is obtained by simplification, as shown in Figure 3. It can be seen from Figure 3 that the side plate is a symmetrical structure when the steel coil does not have an offset condition, so half of the side plate structure can be considered when building the force model, as shown in Figure 4.

The step S1 includes:

其中，y表示钢卷的纵坐标，f₂(x_i)为根据划分区域确定的临界参数值，L_bc表示面板跨度。Step S11: Divide the side plate of the vertical bracket structure into two stages; the first stage is y∈(0,f ₂ (x _i )], and the second stage is

Among them, y represents the ordinate of the steel coil, f ₂ ( _xi ) is the critical parameter value determined according to the divided area, and L _bc represents the panel span.

Step S12: Determine the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage; specifically including:

Step S121: Determine the maximum bending stress corresponding to the first stage, which specifically includes:

When the coil is not biased, the load distribution model of the coil is constructed, and the specific formula is:

Among them, f ₁ (x, y) represents the load distribution model of the steel coil, (x ₀ , y ₀ ) represents the circle center coordinates in the current coordinate system of the steel coil, R _g represents the outer diameter of the steel coil, and (x, y) represents the steel coil The coordinates of the volume.

The coordinate transformation of the load distribution model is performed to obtain a new load distribution model f ₂ (x).

The uniform load is determined according to the weight of the steel coil and the total area of the panel. The specific formula is:

Among them, q _m represents the uniform load, _MG represents the weight of the steel coil, and S _z represents the total area of the panel.

The load distribution value of the side plate is determined according to the uniform load and the new load distribution model, and the specific formula is:

Among them, F ₂ ( _xi ) represents the load distribution value of the side plate in the selected divided area, q _m represents the uniform load, _xi represents the upper limit of the abscissa value in the divided area, L _bc represents the panel span, f ₂ (x) Represents the new load distribution model.

The maximum bending stress corresponding to the first stage is determined according to the load distribution value of the edge plate in the selected divided area. The specific formula is:

Among them, W _2i1 (x _i , y) represents the bending moment corresponding to the first stage, _xi represents the upper limit of the abscissa value in the divided area, y represents the ordinate of the steel coil, and F ₂ ( _xi ) is the selected divided area The load distribution value of the side plate, σ _w1max represents the maximum bending stress corresponding to the first stage, b represents the panel width, h represents the panel height, and f ₂ ( _xi ) is the critical parameter value determined according to the divided area.

Step S122: Determine the maximum bending stress corresponding to the second stage, and the specific formula is:

Among them, W _2i2 (x _i , y) represents the bending moment corresponding to the second stage, y represents the ordinate of the coil, _xi represents the upper limit of the abscissa value in the divided area, and F ₂ ( _xi ) represents the selected divided area The load distribution value of the side plate, q _m represents the uniform load, b represents the equal width of the panel, f ₂ (x _i ) is the critical parameter value determined according to the divided area, σ _w2max represents the maximum bending stress corresponding to the second stage, L _bc is the panel span and h is the panel height.

Step S13: Select the largest of the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage as the first bending stress to be compared.

Step S14: Determine whether the first bending stress to be compared is greater than or equal to the static bending strength of the panel; if the first bending stress to be compared is greater than or equal to the static bending strength of the panel, it means that the load bearing of the side plate does not meet the requirements, and step S3 is executed ; If the first bending stress to be compared is less than the static bending strength of the panel, it means that the load-bearing of the side panel meets the requirements and no operation is required. The static bending strength of the panel in the present invention is determined according to the material of the panel.

Step S15: Calculate the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage. The specific formula is:

Step S151: Calculate the maximum compressive stress corresponding to the first stage, and the specific formula is:

Among them, σ _y1max represents the maximum compressive stress corresponding to the first stage, x represents the abscissa of the steel coil, y represents the ordinate of the steel coil, _xi represents the upper limit of the abscissa value in the divided area, and x _i-1 represents the divided area. The lower limit of the abscissa value of , f ₂ (x _i ) represents the critical parameter value determined according to the divided area, q _m represents the uniform load, b represents the panel width, h represents the panel height, f(x, y) is the steel coil The final contour curve equation.

Step S152: Calculate the maximum compressive stress corresponding to the second stage, and the specific formula is:

Among them, σ _y2max represents the maximum compressive stress corresponding to the second stage, x represents the abscissa of the steel coil, y represents the ordinate of the steel coil, _xi represents the upper limit of the abscissa value in the divided area, and x _i-1 represents the divided area. The lower limit of the abscissa value of , L _bc represents the panel span, q _m represents the uniform load, b represents the equally divided width of the panel, h represents the height of the panel, and f(x, y) is the final profile curve equation of the steel coil.

Step S16: Select the largest of the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage as the compressive stress to be compared.

Step S17: determine whether the compressive stress to be compared is greater than or equal to the allowable compressive stress, if the compressive stress to be compared is greater than or equal to the allowable compressive stress, it means that the load-bearing of the side plate does not meet the requirements, and step S3 is performed; When the compressive stress to be compared is less than the allowable compressive stress, it means that the load-bearing of the side plate meets the requirements and no treatment is required.

Step S18: Calculate the maximum deflection curve equation corresponding to the first stage, and the specific formula is:

Among them, y _1max represents the maximum deflection curve equation corresponding to the first stage, y represents the ordinate of the steel coil, _xi represents the upper limit of the abscissa value in the divided area, q _m represents the uniform load, and f ₂ ( _xi ) is the basis of The critical parameter value determined by dividing the area, L _bc is the panel span, E is the elastic modulus, and I is the moment of inertia.

Step S19: Calculate the maximum deflection curve equation corresponding to the second stage, and the specific formula is:

Among them, y _2max represents the maximum deflection curve equation corresponding to the second stage, y represents the ordinate of the steel coil, _xi represents the upper limit of the abscissa value in the divided area, q _m represents the uniform load, L _bc represents the panel span, E represents the The elastic modulus, I represents the moment of inertia.

The force of the middle plate of the vertical bracket is shown in Figure 5. A typical force model of a simply supported beam is obtained by simplification. The regions are divided and analyzed separately in the width direction of the middle plate, and the model is built according to different parts. The step S2 includes:

Step S21: According to the principle of symmetry, a quarter of the middle plate is divided into regions in the width direction to obtain the first region, the second region and the third region; The tangent is divided into the first area, according to the material mechanics, the simply supported beam combination area and the inner diameter of the coil are divided into the second area, and the simply supported beam with cantilever structure is divided into the third area according to the material mechanics, as shown in Figure 6.

The reconstruction of coordinates in each area according to the curve diagram of the steel coil is shown in Figure 7. The specific steps are as follows:

Step S22: Determine the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region; the specific steps are:

As shown in (a) of Figure 7, the maximum bending stress corresponding to the first region is determined, and the specific formula is:

Among them, F ₃₁ represents the distributed load function corresponding to the first area of the mid-plate, q _m represents the uniform load, L _bc represents the panel span, r _g represents the inner diameter of the steel coil, L _bk represents the mid-plate width, and σ _w31max represents the mid-plate first The maximum bending stress corresponding to the area, b represents the width of the panel, h represents the height of the panel, and x represents the abscissa of the steel coil.

Determine the maximum deflection curve equation corresponding to the first region, and the specific formula is:

Among them, y _31max represents the maximum deflection curve equation corresponding to the first area, L _bc represents the panel span, q _m3 represents the redistributed load in the coordinate system of the first area of the middle plate, x represents the abscissa of the steel coil, and E represents the elastic modulus , I is the moment of inertia.

As shown in (b) of Figure 7, the maximum bending stress corresponding to the second region is determined, and the specific formula is:

Among them, y _i represents the ordinate value selected in a specific situation, F ₃₂ (y _i ) represents the distributed load function corresponding to the second area of the middle plate, q _m represents the uniform load, f ₃₂₁ (y), f ₃₂₂ (y) are the split range of the inscribed arc equation and the split range of the circumscribed arc equation, respectively, σ _w32max represents the maximum bending stress corresponding to the second area of the mid-slab, L _bc represents the panel span, q _m4 represents the coordinate system of the second area of the mid-slab The redistributed load of , x represents the abscissa of the steel coil, y represents the ordinate of the steel coil, dy represents the differential of the ordinate, b represents the width of the panel, and h represents the height of the panel.

Determine the maximum deflection curve equation corresponding to the second region, and the specific formula is:

Among them, y _32max represents the maximum deflection curve equation corresponding to the second area, L _bc represents the panel span, q _m4 represents the redistributed load in the coordinate system of the second area of the middle plate, x represents the abscissa of the steel coil, and E represents the elastic modulus , I is the moment of inertia, and L is the plywood span.

As shown in (c) of Figure 7, the maximum bending stress corresponding to the third region is determined, and the specific formula is:

Among them, y _i represents the ordinate value selected in a specific case, F ₃₃ (y _i ) represents the distributed load function corresponding to the third area of the middle plate, q _m represents the uniform load, x represents the abscissa of the steel coil, and y represents the steel coil The ordinate of the coil, r _g is the inner diameter of the steel coil, R _g is the outer diameter of the steel coil, W _33i1 (x, y _i ) is the bending moment at the cantilever of the simply supported beam in the third region under the new coordinates of the coordinate transformation, and R is the steel coil roll radius, L _bc represents the panel span, W _33i2 represents the bending moment inside the simply supported beam in the third area under the new coordinates of the coordinate transformation, q _m5 represents the redistributed load in the third area coordinate system of the mid-slab, σ _w33max represents the mid-slab The maximum bending stress corresponding to the third region corresponds to the maximum bending moment, b is the panel width, and h is the panel height.

Determine the maximum deflection curve equation corresponding to the third region, and the specific formula is:

Among them, y _33max represents the maximum deflection curve equation corresponding to the third area, L _bc represents the panel span, q _m5 represents the redistributed load in the third area coordinate system of the mid-plate, x represents the abscissa of the steel coil, and a represents the mid-plate exceeding the The length of the midline of the skid, E is the elastic modulus, and I is the moment of inertia.

Step S23: Select the largest of the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region, and the maximum bending stress corresponding to the third region as the second bending stress to be compared.

Step S24: Determine whether the second bending stress to be compared is greater than or equal to the static bending strength of the panel; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel, it means that the load bearing of the side plate does not meet the requirements, and step S3 is executed ; If the second bending stress to be compared is less than the static bending strength of the panel, it means that the load-bearing of the side panel meets the requirements and no treatment is required.

In order to prevent the reduction of the performance of the plywood caused by the cracking of the plywood through the calculation of the load-bearing of the side plate and the middle plate, suggestions for improvement are put forward from the structural weaknesses and processing technology. The specific step S3 includes:

Step S31: Apply glue to seal the plywood strapping belt, and change the edge plate notch and the middle plate notch from right angles to rounded corners, so as to prevent the plywood from colliding with the baling belt and during transportation on the roller table and causing the plywood to crack, Specifically, as shown in Figure 8 and Figure 9 .

Step S32 : Design edge guards for the panel extension edge plates, encapsulate the parts beyond the feet, and assemble the encapsulated edge guards to the middle plate with a nail gun. The thickness of the edge guards is 1 mm, as shown in Figures 10 and 11 .

Example 2:

As shown in FIG. 12 , the present invention also provides a system for optimizing the structure of vertical brackets in the process of steel coil transportation and standing, the system comprising:

The first judgment module 1 is used to judge whether the load-bearing of the side plates of the vertical bracket structure meets the requirements; if the load-bearing of the side plates of the vertical bracket structure does not meet the requirements, the "optimization module" is executed; if the requirements are met, then No processing required.

The second judgment module 2 is used to judge whether the load-bearing of the middle plate of the vertical bracket structure meets the requirements; if the load-bearing of the middle plate of the vertical bracket structure does not meet the requirements, execute the "optimization module"; if the load-bearing of the middle plate of the vertical bracket structure If the requirements are met, no processing is required.

The optimization module 3 is used to optimize the vertical bracket structure.

As an embodiment, the first judgment module 1 of the present invention includes:

其中，y表示钢卷的纵坐标，f₂(x_i)为根据划分区域确定的临界参数值，L_bc表示面板跨度。The side plate of the vertical bracket structure is divided into two stages; the first stage is y∈(0,f ₂ (x _i ,y)], and the second stage is

Among them, y represents the ordinate of the steel coil, f ₂ ( _xi ) is the critical parameter value determined according to the divided area, and L _bc represents the panel span.

The first maximum bending stress determining unit is used for determining the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage.

The first to-be-compared bending stress determination unit is configured to select the largest of the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage as the first to-be-compared bending stress.

a first judging unit for judging whether the first bending stress to be compared is greater than or equal to the static bending strength of the panel; if the first bending stress to be compared is greater than or equal to the static bending strength of the panel, execute the "optimization module"; if the first bending stress to be compared is greater than or equal to the static bending strength of the panel If the first bending stress to be compared is less than the static bending strength of the panel, no operation is required.

As an embodiment, the first judgment module 1 of the present invention further includes:

The maximum compressive stress determination unit is used to calculate the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage.

The unit for determining the compressive stress to be compared is configured to select the largest of the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage as the compressive stress to be compared.

The second judging unit is used to judge whether the compressive stress to be compared is greater than or equal to the allowable compressive stress, if the compressive stress to be compared is greater than or equal to the allowable compressive stress, execute "optimization module"; When the comparative compressive stress is less than the allowable compressive stress, no treatment is required.

As an embodiment, the second judgment module 2 of the present invention includes:

The area dividing unit is used for dividing a quarter of the middle plate in the width direction according to the principle of symmetry, to obtain the first area, the second area and the third area respectively.

The second maximum bending stress determining unit is configured to determine the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region, and the maximum bending stress corresponding to the third region.

The second to-be-compared bending stress determination unit is configured to select the largest of the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region as the first Second, the bending stress is to be compared.

a third judging unit, configured to judge whether the second bending stress to be compared is greater than or equal to the static bending strength of the panel; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel, execute the "optimization module"; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel If the second bending stress to be compared is smaller than the static bending strength of the panel, no treatment is required.

As an embodiment, the optimization module 3 of the present invention includes:

The glue sealing module is used to glue and seal the plywood strapping, and change the edge plate notch and the middle plate notch from right angle to rounded.

The encapsulation module is used to design the edge protection for the panel extension edge plate, encapsulate the part beyond the feet, and assemble the packaged edge protection to the middle plate with a nail gun.

Example 3:

The specification of the vertical bracket is D1000:

In step S1, force analysis is performed on the side plate of the vertical bracket panel, and a load-bearing model is established.

1. The force distribution model of the coil is expressed as: f ₁ (x,y)=(xx ₀ ) ² +(yy ₀ ) ² -450 ² , at this time, take three points (0,450), (283,350), (126,432) , with the point (385,350) as the origin, the original y-axis as the x-axis, and the negative direction of the original x-axis as the y-axis to establish a new coordinate system. The coordinates of the three points become (100,385), (0,102), (82,259), and a new load distribution model f ₂ (x)=ax ² +bx+c is calculated, and the solution is c=102,82 ² a+82b+c=259,100 ² a+100b+c=385, a=0.05, b=-2.17, c=102, the new coil load distribution equation is f ₂ (x)=0.05x ² -2.17x+102.

将边板进行10等分因此dx＝10,故b＝10mm、面板高度h＝30mm，面板的惯性矩

面板跨度L_bc＝770mm。边板载荷为

带入参数得

2. The uniform load is obtained from the total force area of the panel S _z = 517748mm ² and the weight of the steel coil M _G = 10000kg

Divide the side plate into 10 equal parts, so dx=10, so b=10mm, panel height h=30mm, the moment of inertia of the panel

Panel span L _bc =770mm. The side plate load is

Bring in parameters

对应的弯矩

弯应力为

当y＝385mm时

由国家标准《GBT17656-2008》，横纹下的胶合板静曲强度为[σ]＝35MPa，此时最大弯应力已超过面板静曲强度，即最大弯应力已超过胶合板的承受极限，因此需要进行对立托架结构进行优化。3. The bending moment of the panel is divided into two stages, the first stage is the bending moment W _2i1 =F ₂ (10)·y=1600·y corresponding to y∈(0,f ₂ (x _i )]; The two stages are

corresponding bending moment

The bending stress is

When y=385mm

According to the national standard "GBT17656-2008", the static bending strength of the plywood under the horizontal grain is [σ]=35MPa. At this time, the maximum bending stress has exceeded the static bending strength of the panel, that is, the maximum bending stress has exceeded the bearing limit of the plywood, so it is necessary to carry out Optimizing the vertical bracket structure.

弹性模量E＝4000MPa、q_m的再分配载荷

带入参数得极限挠度值

4. The limit deflection value is

Elastic modulus E = 4000MPa, redistribution load of q _m

Bring in the parameters to get the limit deflection value

5. Assuming that the panel bears a uniform load, the maximum bending stress of the side panel exceeds the stress limit of the plywood, and the theoretical deformation in the middle of the side panel reaches 0.2785mm, so the plywood is not easy to be damaged during use. And in actual use, only when the steel coil is placed on the bracket will the bracket bear the uniform load.

带入参数计算得最大压应力为：

6. According to the deflection value of the panel, when the panel is deformed, the compressive stress of the panel on it needs to be calculated due to the support of the brackets on both sides. Take three points (-270, 360), (-126, 432), (-103, 438), and the coordinates relative to the point (-450, 450) become (12, 103), (18, 126), (90, 360) ), solve the final contour curve equation of the steel coil according to three points: f ₂ (x)=-0.0417x ² +7.75x, divide the dunnage into 10 equal parts in the width direction, and ten equal parts in the length direction of the edge plate compressive stress

The maximum compressive stress calculated by bringing in the parameters is:

According to the national standard "GBT 17656-2008", the static bending strength of the plywood under the horizontal grain is [σ]=35MPa. At this time, the maximum compressive stress of the side plate has exceeded the bearing limit of the plywood, so it is necessary to optimize the vertical bracket structure.

In step S2, force analysis is performed on the middle plate of the vertical bracket panel, and a load-bearing model is established.

钢卷内径r_g＝200mm、中板宽度L_bk＝260mm，分布载荷函数为

弯应力为

最大挠度值为

计算得

最大弯应力为

最大挠度值为

面板并不会产生实际的大量变形，但是面板的支撑失去实际作用，只有外力作用时面板产生破坏。1. As shown in (a) in Figure 7, the parameters are brought into x=385mm, b=60mm, panel height h=30mm, and the moment of inertia of the panel

The inner diameter of the steel coil r _g = 200mm, the width of the middle plate L _bk = 260mm, and the distributed load function is

The bending stress is

The maximum deflection value is

Calculated

The maximum bending stress is

The maximum deflection value is

The panel does not actually deform a lot, but the support of the panel loses its actual effect, and only the panel is damaged when external force acts.

最大弯应力为

根据宽度将y进行10等分，因此y＝61.2mm，x≈385mm，得

最大挠度值为

变形量超过胶合板的极限。2. As shown in (b) in Figure 7, three points (403, 200), (430, 132), (424, 150) are taken from the external tangent arc, and three points (0, 200), (150, 132), (120, 160) are taken from the internal tangent arc, and The origin coordinates of the point (0,132) are transformed into (403,68), (430,0), (424,18); (0,68), (150,0), (120,28). The circumscribed arc equation f ₃₂₁ (y)=-0.0013y ² -0.31y+430 can be obtained; f ₃₂₂ (y)=-0.028y ² -0.3y+150. Therefore, the area load

The maximum bending stress is

Divide y into 10 equal parts according to the width, so y=61.2mm, x≈385mm, we get

The maximum deflection value is

The amount of deformation exceeds the limit of plywood.

该区域分布载荷为

将区域进行10等分此时参数为dy＝13.2mm，x≈250mm，b＝13.2mm，h＝30mm，

q_m5＝7.5N/mm²，a＝65，因此可得：F_33i1≈0.5679·250·13.2＝1874N，弯矩为

挠度值为

计算得W_33i2(x,y_i)＝202502.5N·mm²，最大弯应力为

最大挠度值计算可得

3. As shown in (c) in Figure 7, the coordinates of the three points (430, 132), (440, 94) (450, 0) relative to the point (0, 132) are (403, 68), (430, 0), (424,18), its arc equation is

The distributed load in this area is

Divide the area into 10 equal parts. At this time, the parameters are dy=13.2mm, x≈250mm, b=13.2mm, h=30mm,

q _m5 =7.5N/mm ² , a = 65, therefore: F _33i1 ≈0.5679·250·13.2=1874N, the bending moment is

deflection value

Calculated W _33i2 (x,y _i )＝202502.5N·mm ² , the maximum bending stress is

The maximum deflection value can be calculated

4. The maximum bending stress of the middle plate exceeds the limit of the panel. The bending stress analysis of the part in contact with the steel coil shows that the bending stress of the largest part is the middle plate part: σ _w31max = 556.5MPa. According to the national standard "GBT 17656-2008", the static bending strength of the plywood under the horizontal grain is [σ]=35MPa, at this time, the maximum bending stress of the middle plate has exceeded the static bending strength of the plywood, so the structure needs to be optimized.

In step S3, in order to prevent the reduction of the performance of the plywood caused by the cracking of the plywood, suggestions for improvement are proposed from the structural weaknesses and processing technology, including the following specific steps:

1. On the basis of additional gluing and sealing at the plywood strapping belt, the notches of the side plate and the middle plate are changed from right angles to rounded corners to prevent the plywood from colliding with the strapping belt and during roller transportation, which may cause the plywood to crack.

2. Design the edge guard for the extended edge plate of the panel, and encapsulate the part beyond the foot. The thickness of the edge guard is 1mm. The edge guard is assembled to the middle plate with a nail gun, and the edge guard is processed and designed according to different specifications and sizes. .

Example 2:

The vertical bracket specification is D1300

In step S1, force analysis is performed on the side plate of the vertical bracket panel, and a load-bearing model is established.

1. The force distribution model of the coil is expressed as: f ₁ (x,y)=(xx ₀ ) ² +(yy ₀ ) ² -450 ² , at this time, take three points (0,450), (283,350), (126,432) , with the point (505, 350) as the origin, the original y-axis as the x-axis, and the negative direction of the original x-axis as the y-axis to establish a new coordinate system. The coordinates of the three points become (100,505), (0,222), (82,379), calculate f ₂ (x)=ax ² +bx+c, and solve c=222, 82 ² a+82b+c=379, 100 ² a+ 100b+c=505, a=0.051, b=-2.27, c=222, the coil load distribution equation is f ₂ (x)=0.051x ² -2.27x+222.

将边板进行10等分因此dx＝10,故b＝10mm、面板高度h＝30mm，面板的惯性矩

面板跨度L_bc＝1010mm。边板载荷为

带入参数得

2. The uniform load is obtained from the total force area of the panel S _z = 818409mm ² and the weight of the steel coil M _G = 12000kg

Divide the side plate into 10 equal parts, so dx=10, so b=10mm, panel height h=30mm, the moment of inertia of the panel

Panel span L _bc = 1010 mm. The side plate load is

Bring in parameters

对应的弯矩

弯应力为

当

时，最大弯应力为：

由国家标准《GBT 17656-2008》，横纹下的胶合板静曲强度为[σ]＝35MPa，此时最大弯应力已超过面板静曲强度，即最大弯应力已超过胶合板的承受极限。因此需要进行对立托架结构进行优化。3. The bending moment of the panel is divided into two stages. The first stage is the bending moment corresponding to y∈(0,f ₂ (x _i )] W _2i1 =F ₂ ·y=1269·y; the second stage for

corresponding bending moment

The bending stress is

when

, the maximum bending stress is:

According to the national standard "GBT 17656-2008", the static bending strength of plywood under the horizontal grain is [σ]=35MPa, at this time the maximum bending stress has exceeded the static bending strength of the panel, that is, the maximum bending stress has exceeded the bearing limit of the plywood. Therefore, it is necessary to optimize the vertical bracket structure.

弹性模量E＝4000MPa、q_m的再分配载荷

带入参数得极限挠度值

4. The limit deflection value is

Elastic modulus E = 4000MPa, redistribution load of q _m

Bring in the parameters to get the limit deflection value

5. Assuming that the panel bears a uniform load, the local maximum bending stress of the side panel exceeds the stress limit of the plywood, and the theoretical deformation in the middle of the side panel reaches 0.477mm, so the plywood is extremely difficult to be damaged during use. And in actual use, only when the steel coil is placed on the bracket will the bracket bear the uniform load.

带如参数计算得最大压应力为：

6. According to the deflection value of the panel, when the panel is deformed, the compressive stress of the panel on it needs to be calculated due to the support of the brackets on both sides. Take three points (-270, 360), (-126, 432), (-103, 438), and the coordinates relative to the point (-450, 450) become (12, 103), (18, 126), (90, 360) ), solve the final contour curve equation of the steel coil according to three points: f ₂ (x)=-0.0417x ² +7.75x, divide the dunnage into 10 equal parts in the width direction, and ten equal parts in the length direction of the edge plate compressive stress

The maximum compressive stress calculated with such parameters is:

According to the national standard "GBT 17656-2008", the static bending strength of the plywood under the horizontal grain is [σ]=35MPa. At this time, the maximum compressive stress of the side plate does not exceed the bearing limit of the plywood, so there is no need to optimize the vertical bracket structure. .

In step S2, force analysis is performed on the middle plate of the vertical bracket panel, and a load-bearing model is established.

钢卷内径r_g＝200mm、中板宽度L_bk＝260mm，分布载荷函数为

压应力为

最大挠度值为

计算得

最大弯应力为

最大挠度值为

面板并不会产生实际的大量变形，但是面板的支撑失去实际作用，只有外力作用时面板产生破坏。1. As shown in (a) in Figure 7, the parameters are brought into x=385mm, b=60mm, panel height h=30mm, and the moment of inertia of the panel

The inner diameter of the steel coil r _g = 200mm, the width of the middle plate L _bk = 260mm, and the distributed load function is

The compressive stress is

The maximum deflection value is

Calculated

The maximum bending stress is

The maximum deflection value is

The panel does not actually deform a lot, but the support of the panel loses its actual effect, and only the panel is damaged when external force acts.

最大弯应力为

根据宽度将y进行10等分，因此y＝61.2mm，x≈385mm，最大弯应力为：

最大挠度值为

变形量未超过胶合板的极限。2. As shown in (b) in Figure 7, three points (403, 200), (430, 132), (424, 150) are taken from the external tangent arc, and three points (0, 200), (150, 132), (120, 160) are taken from the internal tangent arc, and The origin coordinates of the point (0,132) are transformed into (403,68), (430,0), (424,18); (0,68), (150,0), (120,28). The circumscribed arc equation f ₃₂₁ (x, y)=-0.0013y ² -0.31y+430 can be obtained; f ₃₂₂ (x, y)=-0.028y ² -0.3y+150. Therefore, the area load

The maximum bending stress is

Divide y into 10 equal parts according to the width, so y=61.2mm, x≈385mm, and the maximum bending stress is:

The maximum deflection value is

The amount of deformation did not exceed the limit of the plywood.

该区域分布载荷为

将区域进行10等分此时参数为dy＝13.2mm，x≈185mm，b＝13.2mm，h＝30mm，

a＝65、q_m5＝5.7N/mm²因此可得：F₃₃₁≈0.4311×250×13.2＝1423N，弯矩为

挠度值为

计算得W_33i2(x,y_i)＝157092.5N·mm²，最大弯应力为

最大挠度值计算可得

3. As shown in (c) in Figure 7, the coordinates of the three points (430, 132), (440, 94) (450, 0) relative to the point (0, 132) are (403, 68), (430, 0), (424,18), its arc equation is

The distributed load in this area is

Divide the area into 10 equal parts. At this time, the parameters are dy=13.2mm, x≈185mm, b=13.2mm, h=30mm,

a=65, q _m5 =5.7N/mm ² , therefore: F ₃₃₁ ≈0.4311×250×13.2=1423N, the bending moment is

deflection value

Calculated W _33i2 (x,y _i )＝157092.5N·mm ² , the maximum bending stress is

The maximum deflection value can be calculated

4. The maximum bending stress of the middle plate exceeds the limit of the static bending strength of the panel. Since the steel coil is a rigid body, the panel will lose the support of the steel coil when the panel is deformed greatly at the moment of the load. At this time, the panel and the steel coil are in the center. There is almost no contact at all places, but once it comes into contact with external force, the panel is very easy to break. The bending stress analysis of the part in contact with the steel coil shows that the bending stress of the largest part is the middle plate part: σ _w31max = 726.83MPa. Combined with the national standard "GBT 17656-2008", the static bending strength of the plywood under the horizontal grain is [σ]=35MPa, at this time, the maximum bending stress of the middle plate has exceeded the static bending strength of the plywood, so the structure needs to be optimized.

In step S3, in order to prevent the reduction of the performance of the plywood caused by the cracking of the plywood, suggestions for improvement are proposed from the structural weaknesses and processing technology, including the following specific steps:

1. On the basis of additional gluing and sealing at the plywood strapping belt, the notches of the side plate and the middle plate are changed from right angles to rounded corners to prevent the plywood from colliding with the strapping belt and during roller transportation, which may cause the plywood to crack.

2. Design the edge guard for the extended edge plate of the panel, and encapsulate the part beyond the foot. The thickness of the edge guard is 1mm. The edge guard is assembled to the middle plate with a nail gun, and the edge guard is processed and designed according to different specifications and sizes. .

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

In this paper, specific examples are used to illustrate the principles and implementations of the present invention. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present invention; meanwhile, for those skilled in the art, according to the present invention There will be changes in the specific implementation and application scope. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A method for optimizing the structure of a vertical bracket used in the steel coil transportation and standing process is characterized by comprising the following steps:

step S1: judging whether the side plate bearing of the vertical bracket structure meets the requirements or not; if the side plate load bearing of the vertical bracket structure does not meet the requirement, executing step S3; if the requirements are met, no processing is needed;

step S2: judging whether the bearing of the middle plate of the vertical bracket structure meets the requirement or not; if the load of the middle plate of the vertical bracket structure does not meet the requirement, executing the step S3; if the bearing of the middle plate of the vertical bracket structure meets the requirement, the middle plate does not need to be processed;

step S3: the vertical bracket structure is optimized.

2. The method for optimizing the structure of the vertical support bracket for the steel coil transportation and standing process according to claim 1, wherein the step S1 comprises:

dividing the side plate of the vertical bracket structure into two stages; the first stage is y e (0, f)₂(x_i)]The second stage is

Wherein y represents the ordinate of the coil of steel, f₂(x_i) For critical parameter values determined from the divided regions, L_bcRepresenting a panel span;

determining the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage;

selecting the largest one of the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage as a first bending stress to be compared;

judging whether the first bending stress to be compared is greater than or equal to the static bending strength of the panel or not; if the first bending stress to be compared is greater than or equal to the static bending strength of the panel, executing step S3; if the first bending stress to be compared is smaller than the static bending strength of the panel, no operation is needed.

3. The method for optimizing the structure of the vertical support bracket for the steel coil transportation and standing process of claim 2, wherein the step S1 further comprises:

calculating the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage;

selecting the largest one of the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage as the compressive stress to be compared;

judging whether the compressive stress to be compared is greater than or equal to an allowable compressive stress, and executing the step S3 if the compressive stress to be compared is greater than or equal to the allowable compressive stress; and if the compressive stress to be compared is less than the allowable compressive stress, no treatment is needed.

4. The method for optimizing the structure of the vertical support bracket for the steel coil transportation and standing process according to claim 1, wherein the step S2 comprises:

according to the symmetry principle, the quarter part of the middle plate is subjected to region division in the width direction to obtain a first region, a second region and a third region respectively;

determining the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region;

selecting the largest one of the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region as a second bending stress to be compared;

judging whether the second bending stress to be compared is greater than or equal to the static bending strength of the panel or not; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel, executing step S3; if the second bending stress to be compared is smaller than the static bending strength of the panel, no treatment is needed.

5. The method for optimizing the structure of the vertical support bracket for the steel coil transportation and standing process according to claim 1, wherein the step S3 comprises:

gluing and sealing the binding tape of the plywood, and changing the notches of the side plates and the notches of the middle plate from right angles to round angles;

and designing a protective edge for the panel extension side plate, packaging the part exceeding the pad foot, and assembling the packaged protective edge on the middle plate by using a nail gun.

6. A system for optimizing the structure of a vertical bracket used in the steel coil transportation and standing process is characterized by comprising:

the first judgment module is used for judging whether the side plate bearing of the vertical bracket structure meets the requirement or not; if the side plate load bearing of the vertical bracket structure does not meet the requirement, executing an 'optimization module'; if the requirements are met, no processing is needed;

the second judging module is used for judging whether the bearing of the middle plate of the vertical bracket structure meets the requirement or not; if the bearing of the middle plate of the vertical bracket structure does not meet the requirement, executing an optimization module; if the bearing of the middle plate of the vertical bracket structure meets the requirement, the middle plate does not need to be processed;

an optimization module for optimizing the vertical bracket structure.

7. The system for optimizing the structure of the vertical bracket for the steel coil transportation and standing process according to claim 6, wherein the first determining module comprises:

the dividing unit is used for dividing the side plate of the vertical bracket structure into two stages; the first stage is y e (0, f)₂(x_i)]The second stage is

Wherein y represents the ordinate of the coil of steel, f₂(x_i) For critical parameter values determined from the divided regions, L_bcRepresenting a panel span;

the first maximum bending stress determining unit is used for determining the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage;

the first bending stress to be compared determining unit is used for selecting the largest one of the maximum bending stress corresponding to the first stage and the maximum bending stress corresponding to the second stage as the first bending stress to be compared;

the first judging unit is used for judging whether the first bending stress to be compared is greater than or equal to the static bending strength of the panel or not; if the first bending stress to be compared is larger than or equal to the static bending strength of the panel, executing an optimization module; if the first bending stress to be compared is smaller than the static bending strength of the panel, no operation is needed.

8. The system for optimizing the structure of the vertical bracket for the steel coil transportation and standing process according to claim 7, wherein the first determining module further comprises:

the maximum compressive stress determining unit is used for calculating the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage;

the to-be-compared compressive stress determining unit is used for selecting the largest one of the maximum compressive stress corresponding to the first stage and the maximum compressive stress corresponding to the second stage as the to-be-compared compressive stress;

a second judging unit, configured to judge whether the compressive stress to be compared is greater than or equal to an allowable compressive stress, and if the compressive stress to be compared is greater than or equal to the allowable compressive stress, execute an "optimization module"; and if the compressive stress to be compared is less than the allowable compressive stress, no treatment is needed.

9. The system for optimizing the structure of the vertical support bracket for the steel coil transportation and standing process according to claim 6, wherein the second determination module comprises:

the area dividing unit is used for dividing the quarter part of the middle plate in the width direction according to the symmetry principle to respectively obtain a first area, a second area and a third area;

the second maximum bending stress determining unit is used for determining the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region;

the second bending stress determining unit is used for selecting the largest one of the maximum bending stress corresponding to the first region, the maximum bending stress corresponding to the second region and the maximum bending stress corresponding to the third region as a second bending stress to be compared;

the third judging unit is used for judging whether the second bending stress to be compared is greater than or equal to the static bending strength of the panel; if the second bending stress to be compared is greater than or equal to the static bending strength of the panel, executing an optimization module; if the second bending stress to be compared is smaller than the static bending strength of the panel, no treatment is needed.

10. The system for optimizing a steel coil transportation and rest process vertical bracket structure according to claim 6, wherein the optimizing module comprises:

the gluing and sealing module is used for gluing and sealing the binding belt of the plywood and changing the notches of the side plates and the notches of the middle plate from right angles to round angles;

and the packaging module is used for designing a protective edge for the panel extension side plate, packaging the part exceeding the foot pad and assembling the packaged protective edge on the middle plate by using a nail gun.

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